Question
Consider the following hypothetical problem. Potassium ions have a concentration of 115 x 10 -3 mol/liter inside the cell and 4.5 x 10 -3 mol/liter
Consider the following hypothetical problem. Potassium ions have a concentration of 115 x 10 -3 mol/liter inside the cell and 4.5 x 10 -3 mol/liter outside the cell. The cell wall has a channel through which the potassium ions can travel and it is 25.0 nm in length and 4.00 nm in diameter. Take the diffusion coefficient of potassium to be 3.00 x 10 -9 m 2 /s.
A) What is the difference in concentration, Δc across the cell wall in molecules/m 3 ?
B) What is the cross-sectional area of the potassium channel?
C) What is the rate of molecule transfer of the potassium ions?
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International Economics
Authors: Robert C. Feenstra, Alan M. Taylor
3rd edition
978-1429278515, 142927851X, 978-1319029517, 1319029515, 978-1429278447
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